:root { --bg: #ffffff; --card: #f4f4f2; --ink: #131315; --ink2: #6e6e73; --accent: #0b5eff; }
@media (prefers-color-scheme: dark) { :root { --bg: #000; --card: #1c1c1e; --ink: #f5f5f7; --ink2: #98989f; --accent: #3d86ff; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 17px/1.5 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif; }
main { max-width: 680px; margin: 0 auto; padding: 48px 20px 64px; }
h1 { font-size: 34px; letter-spacing: -0.02em; margin: 0 0 8px; }
h2 { font-size: 20px; margin: 0 0 6px; }
p { margin: 0 0 10px; color: var(--ink2); }
.card { background: var(--card); border-radius: 18px; padding: 18px 20px; margin: 16px 0; }
a { color: var(--accent); text-decoration: none; }
nav { display: flex; gap: 18px; margin-bottom: 36px; font-weight: 600; }
.small { font-size: 14px; }